Tackle welding and grinding projects with ease using the 20704 auto-darkening solar-powered welding helmet from ArcPro. The helmet"s shade automatically darkens in 1/25,000th of a second at the first flash of intense light to protect your eyes from ultraviolet radiation. The shade adjusts between shade DIN numbers 9 and 13 for welding or to shade DIN 4 for grinding. Other features include a 3.78-by-2.07-inch viewing area, adjustable sensitivity and delay controls, and replaceable 3-volt lithium batteries. 20704 Auto-Darkening Solar Powered Welding Helmet At a Glance: Auto-darkens in 1/25,000th of a second Weld and grind modes and variable shade Viewing area of 3.78 by 2.07 inches Adjustable sensitivity and delay controls The ArcPro 20704 has a variable shade that adjusts between shade DIN numbers 9 and 13 for welding projects (click each to enlarge).Fast Auto-Darkening for Optimal Protection Using the ArcPro 20704 solar-powered welding helmet, you can protect your eyes, face, and neck from ultraviolet light while you"re doing welding or grinding work. An auto-darkening feature darkens the shade in 1/25,000th of a second at the first flash of intense light and clears the shade when the welding or grinding stops. Welding and Grinding Modes This helmet offers two modes--weld and grind--and has a variable shade that adjusts between shade DIN numbers 9 and 13 for welding projects or to shade DIN 4 for grinding work. Large Viewing Field and Adjustable Headband The ArcPro 20704 provides a large viewing area of 3.78 by 2.07 inches so that you can clearly see your workspace. A two-way, adjustable, padded headband enables a comfortable fit. Product Information Other features of the ArcPro 20704 include adjustable sensitivity and delay controls and an automatic on/off switch with replaceable 3-volt lithium batteries. The product meets American National Standards Institute (ANSI) Z87.1 safety standards. What"s in the Box ArcPro 20704 auto-darkening solar-powered welding helmet. This helmet offers weld and grind modes along sensitivity and delay controls (view larger).